Critical Strike

Revenge is planned against Unity. Denver, Charlie, and Layla are trapped in the middle of a galactic conflict that has spanned across many millennia. With no immediate allies on either side, they must use all of their skill and strength to stay alive and to find a way back to Earth - if there is one. An old enemy of Unity is intent on making them pay for his humiliating treatment. He's gathering forces to the south with vengeance in mind. Mike and Mae must work together with the citizens of Unity to find a way of repelling Augustus' force - or face extinction at the hands of the old emperor.